Electrical Potential Energy. Chapter 25. Electric Potential Energy, final. Electric Potential Energy. Electric Potential.
|
|
- Willis Harrington
- 6 years ago
- Views:
Transcription
1 Chapter 25 Chapter 25 Electric Potential Electrical Potential Energy! When a test charge, q 0 is placed in an electric field E, it experiences a force: F = q E 0! Is this force conservative? 1 2 Electric Potential Energy! What is the work done by the electric field? Electric Potential Energy, final! Because q o E is conservative, the line integral does not depend on the path taken by the charge! This is the change in potential energy of the system
2 Electric Potential! The potential energy per unit charge, U/q o, is the electric potential! The potential is independent of the value of q o! The potential has a value at every point in an electric field U! The electric potential is V = q o Electric Potential, cont.! The potential is a scalar quantity! Since energy is a scalar! As a charged particle moves in an electric field, it will experience a change in potential U B V = = d q E s A o 5 6 Work and Electric Potential! Assume a charge moves in an electric field without any change in its kinetic energy! The work performed on the charge is W = U = q V Units! 1 V = 1 J/C! V is a volt! It takes one joule of work to move a 1- coulomb charge through a potential difference of 1 volt! In addition, 1 N/C = 1 V/m! This indicates we can interpret the electric field as a measure of the rate of change with position of the electric potential 7 8 2
3 Electron-Volts Illustration by Debra Solomon! Another unit of energy that is commonly used in atomic and nuclear physics is the electronvolt! One electron-volt is defined as the energy a charge-field system gains or loses when a charge of magnitude e (an electron or a proton) is moved through a potential difference of 1 volt! 1 ev = 1.60 x J 9 10 Potential Difference in a Uniform Field! The equations for electric potential can be simplified if the electric field is uniform: Problem 1 2. A uniform electric field of magnitude 325 V/m is directed in the negative y direction as shown in the figure. The coordinates of point A are (-0.200, ) m, and those of point B are (0.400, 0.500) m. Calculate the potential difference V B V A, using the blue path
4 Energy and the Direction of Electric Field PE is + PE is Problem 2 1. Calculate the speed in km/s of a proton that is accelerated from rest through a potential difference of 133 V More About Directions! A system consisting of a positive charge and an electric field loses electric potential energy when the charge moves in the direction of the field! An electric field does work on a positive charge when the charge moves in the direction of the electric field! The charged particle gains kinetic energy equal to the potential energy lost by the charge-field system! Another example of Conservation of Energy 15 Directions, cont.! If q o is negative, then U is positive! A system consisting of a negative charge and an electric field gains potential energy when the charge moves in the direction of the field! In order for a negative charge to move in the direction of the field, an external agent must do positive work on the charge 16 4
5 Equipotentials! Point B is at potential than point A! Points B and C?! The name equipotential surface is given to any surface consisting of a continuous distribution of points having the same electric potential Potential and Point Charges! A positive point charge produces a field directed radially outward! The potential difference between points A and B is Potential and Point Charges, cont.! The electric potential is independent of the path between points A and B! It is customary to choose a reference potential of V = 0 at r A =! Then the potential at some point r is V = q ke r Potential Energy of Multiple Charges! Consider two charged particles! The potential energy of the system is U = k e qq r
6 More About U of Multiple Charges U with Multiple Charges, final! If the two charges are the same sign, U is positive and work must be done to bring the charges together! If the two charges have opposite signs, U is negative and work is done to keep the charges apart 21! If there are more than two charges, then find U for each pair of charges and add them! For three charges: qq 1 2 qq 1 3 qq 2 3 U = ke + + r12 r13 r23! The result is independent of the order of the charges 22 E and V for an Infinite Sheet of Charge are the dashed blue lines! The electric field lines are the brown lines are everywhere perpendicular to the field lines E and V for a Point Charge are the dashed blue lines! The electric field lines are the brown lines are everywhere perpendicular to the field lines
7 E and V for a Dipole are the dashed blue lines! The electric field lines are the brown lines are everywhere perpendicular to the field lines Electric Field from Potential, General! In general, the electric potential is a function of all three dimensions! Given V (x, y, z) you can find E x, E y and E z as partial derivatives V V V Ex = Ey = Ez = x y z Problem 3 3. Over a certain region of space, the electric potential is V = 2x - x 2 y + 2yz 2. Find the expression for the x, y, and z component of the electric field over this region. (Use x, y, and z as necessary.) V for a Continuous Charge Distribution (Extra material)! To find the total potential, you need to integrate to include the contributions from all the elements dq V = ke r! This value for V uses the reference of V = 0 when P is infinitely far away from the charge distributions
8 V for a Uniformly Charged Ring (Extra material)! P is located on the perpendicular central axis of the uniformly charged ring! The ring has a radius a and a total charge Q dq kq e V = ke = r x + a 2 2 V for a Uniformly Charged Disk (Extra material)! The ring has a radius a and surface charge density of σ ( ) 1 = V 2πkeσ x a x V for a Finite Line of Charge (Extra material)! A rod of line l has a total charge of Q and a linear charge density of λ 2 2 kq e! +! + a V = ln! a V for a Uniformly Charged Sphere (Extra material)! A solid sphere of radius R and total charge Q Q! For r > R, V = ke r! For r < R, kq e 2 2 VD VC = R r 3 2R ( )
9 Electrostatic Precipitator The Xerographic Process! An application of electrical discharge in gases is the electrostatic precipitator! It removes particulate matter from combustible gases! The air to be cleaned enters the duct and moves near the wire! As the electrons and negative ions created by the discharge are accelerated toward the outer wall by the electric field, the dirt particles become charged! Most of the dirt particles are negatively charged and are drawn to the walls by the electric field Application Laser Printer Potentials Due to Various Charge Distributions! The steps for producing a document on a laser printer is similar to the steps in the xerographic process! Steps a, c, and d are the same! The major difference is the way the image forms on the selenium-coated drum! A rotating mirror inside the printer causes the beam of the laser to sweep across the selenium-coated drum! The electrical signals form the desired letter in positive charges on the selenium-coated drum! Toner is applied and the process continues as in the xerographic process
What will the electric field be like inside the cavity?
What will the electric field be like inside the cavity? 1. There is no charge inside the gaussian surface so E = 0 2. There is no net flux through the surface but there is an E field 3. Gauss s law doesn
More informationElectric Potential Lecture 5
Chapter 23 Electric Potential Lecture 5 Dr. Armen Kocharian Electrical Potential Energy When a test charge is placed in an electric field, it experiences a force F = q o E The force is conservative ds
More informationChapter 25. Electric Potential
Chapter 25 Electric Potential Electric Potential Electromagnetism has been connected to the study of forces in previous chapters. In this chapter, electromagnetism will be linked to energy. By using an
More informationChapter 25. Electric Potential
Chapter 25 Electric Potential Electric Potential Electromagnetism has been connected to the study of forces in previous chapters. In this chapter, electromagnetism will be linked to energy. By using an
More informationEX. Potential for uniformly charged thin ring
EX. Potential for uniformly charged thin ring Q dq r R dφ 0 V ( Z ) =? z kdq Q Q V =, dq = Rdϕ = dϕ Q r 2πR 2π 2π k Q 0 = d ϕ 0 r 2π kq 0 2π = 0 d ϕ 2π r kq 0 = r kq 0 = 2 2 R + z EX. Potential for uniformly
More informationElectric Potential Energy & Voltage. Tesla Envy =jlzeqz4efqa&feature=related
Electric Potential Energy & Voltage Tesla Envy http://www.youtube.com/watch?v =jlzeqz4efqa&feature=related Ch 23 & 24: Electric Force and Field F qq k r 1 2rˆ 12 2 F qe kq Electric Field E due to q : E
More informationChapter 16. Electric Energy and Capacitance
Chapter 16 Electric Energy and Capacitance Electric Potential of a Point Charge The point of zero electric potential is taken to be at an infinite distance from the charge The potential created by a point
More informationChapter 17 & 18. Electric Field and Electric Potential
Chapter 17 & 18 Electric Field and Electric Potential Electric Field Maxwell developed an approach to discussing fields An electric field is said to exist in the region of space around a charged object
More informationElectric Potential Energy Chapter 16
Electric Potential Energy Chapter 16 Electric Energy and Capacitance Sections: 1, 2, 4, 6, 7, 8, 9 The electrostatic force is a conservative force It is possible to define an electrical potential energy
More informationCH 24. Electric Potential
CH 24 Electric Potential [SHIVOK SP212] January 8, 2016 I. Electric Potential Energy A. Experimentally, physicists and engineers discovered that the electric force is conservative and thus has an associated
More informationChapter 23 Electric Potential. Copyright 2009 Pearson Education, Inc.
Chapter 23 Electric Potential Units of Chapter 23 Electric Potential Energy and Potential Difference Relation between Electric Potential and Electric Field Electric Potential Due to Point Charges Potential
More informationChapter 24. Electric Potential
Chapter 24 Chapter 24 Electric Potential Electric Potential Energy When an electrostatic force acts between two or more charged particles within a system of particles, we can assign an electric potential
More informationHalliday/Resnick/Walker Fundamentals of Physics
Halliday/Resnick/Walker Fundamentals of Physics Classroom Response System Questions Chapter 24 Electric Potential Interactive Lecture Questions 24.2.1. Two electrons are separated by a distance R. If the
More informationHandout 3: Electric potential and electric potential energy. Electric potential
Handout 3: Electric potential and electric potential energy Electric potential Consider a charge + fixed in space as in Figure. Electric potential V at any point in space is defined as the work done by
More informationWhat You Already Know
What You Already Know Coulomb s law Electric fields Gauss law Electric fields for several configurations Point Line Plane (nonconducting) Sheet (conducting) Ring (along axis) Disk (along axis) Sphere Cylinder
More informationElectric Potential II
Electric Potential II Physics 2415 Lecture 7 Michael Fowler, UVa Today s Topics Field lines and equipotentials Partial derivatives Potential along a line from two charges Electric breakdown of air Potential
More informationEssential University Physics
Essential University Physics Richard Wolfson 22 Electric Potential PowerPoint Lecture prepared by Richard Wolfson Slide 22-1 In this lecture you ll learn The concept of electric potential difference Including
More informationWhich requires the most work, to move a positive charge from P to points 1, 2, 3 or 4? All points are the same distance from P.
week 4 Which requires the most work, to move a positive charge from P to points 1, 2, 3 or 4? All points are the same distance from P. 1) P 1 2) P 2 3) P 3 4) P 4 5) all require the same amount of work
More informationPhysics 240 Fall 2003: Exam #1. Please print your name: Please list your discussion section number: Please list your discussion instructor:
Physics 4 Fall 3: Exam #1 Please print your name: Please list your discussion section number: Please list your discussion instructor: Form #1 Instructions 1. Fill in your name above. This will be a 1.5
More information1. The diagram shows the electric field lines produced by an electrostatic focussing device.
1. The diagram shows the electric field lines produced by an electrostatic focussing device. Which one of the following diagrams best shows the corresponding equipotential lines? The electric field lines
More informationPHYS 221 General Physics II
PHYS 221 General Physics II Elec. Potential Energy, Voltage, Equipotentials Spring 2015 Assigned Reading: 18.1 18.3 Lecture 4 Review: Gauss Law Last Lecture E q enc o E EAcos Gauss Law Very useful to determine
More informationWhat You Already Know
What You Already Know Coulomb s law Electric fields Gauss law Electric fields for several configurations Point Line Plane (nonconducting) Sheet (conducting) Ring (along axis) Disk (along axis) Sphere Cylinder
More informationfree space (vacuum) permittivity [ F/m]
Electrostatic Fields Electrostatic fields are static (time-invariant) electric fields produced by static (stationary) charge distributions. The mathematical definition of the electrostatic field is derived
More informationPhysics 222, Spring 2010 Quiz 3, Form: A
Physics 222, Spring 2010 Quiz 3, Form: A Name: Date: Instructions You must sketch correct pictures and vectors, you must show all calculations, and you must explain all answers for full credit. Neatness
More informationVU Mobile Powered by S NO Group All Rights Reserved S NO Group 2012
PHY101 Physics Final Term Solved MCQs (Latest) 1 1. A total charge of 6.3 10 8 C is distributed uniformly throughout a 2.7-cm radius sphere. The volume charge density is: A. 3.7 10 7 C/m3 B. 6.9 10 6 C/m3
More informationChapter 21 Chapter 24. Electric Potential. Copyright 2014 John Wiley & Sons, Inc. All rights reserved.
Chapter 21 Chapter 24 Electric Potential Copyright 24-1 What is Physics? Experimentally, physicists and engineers discovered that the electric force is conservative and thus has an associated electric
More informationPHYS102 Previous Exam Problems. Electric Potential
PHYS102 Previous Exam Problems CHAPTER 24 Electric Potential Electric potential energy of a point charge Calculating electric potential from electric field Electric potential of point charges Calculating
More information+2Q -2Q. (a) 672 N m 2 /C (b) 321 N m 2 /C (c) 105 N m 2 /C (d) 132 N m 2 /C (e) 251 N m 2 /C
1. The figure below shows 4 point charges located on a circle centered about the origin. The exact locations of the charges on the circle are not given. What can you say about the electric potential created
More informationPhys 2102 Spring 2002 Exam 1
Phys 2102 Spring 2002 Exam 1 February 19, 2002 1. When a positively charged conductor touches a neutral conductor, the neutral conductor will: (a) Lose protons (b) Gain electrons (c) Stay neutral (d) Lose
More informationCHAPTER 24. Electric Potential
CHAPTE 4 1* A uniform electric field of kn/c is in the direction. A positive point charge Q = 3 µc is released from rest at the origin. (a) What is the potential difference V(4 m) V()? (b) What is the
More informationDanger High Voltage! Your friend starts to climb on this... You shout Get away! That s High Voltage!!! After you save his life, your friend asks:
Danger High Voltage! Your friend starts to climb on this... You shout Get away! That s High Voltage!!! After you save his life, your friend asks: What is Voltage anyway? Voltage... Is the energy (in Joules)
More informationElectric Fields Part 1: Coulomb s Law
Electric Fields Part 1: Coulomb s Law F F Last modified: 07/02/2018 Contents Links Electric Charge & Coulomb s Law Electric Charge Coulomb s Law Example 1: Coulomb s Law Electric Field Electric Field Vector
More informationSemester 2 Physics (SF 026) Lecture: BP 3 by Yew Sze Fiona Website:
Semester 2 Physics (SF 026) Lecture: BP 3 by Yew Sze Ling @ Fiona Website: http://yslphysics.weebly.com/ Chapter 1: Electrostatics The study of electric charges at rest, the forces between them and the
More informationElectric Potential Practice Problems
Electric Potential Practice Problems AP Physics Name Multiple Choice 1. A negative charge is placed on a conducting sphere. Which statement is true about the charge distribution (A) Concentrated at the
More informationChapter 17. Electric Potential Energy and the Electric Potential
Chapter 17 Electric Potential Energy and the Electric Potential Consider gravity near the surface of the Earth The gravitational field is uniform. This means it always points in the same direction with
More informationElectric Potential. 1/22/14 Physics for Scientists & Engineers 2, Chapter 23 1
Electric Potential 1/22/14 Physics for Scientists & Engineers 2, Chapter 23 1 Announcements! First exam is next Tuesday, January 28 45 minute exam during lecture time You can bring a 5 by 8 size cheat
More informationThe Electric Field of a Finite Line of Charge The Electric Field of a Finite Line of
The Electric Field of a Finite Line of Charge The Electric Field of a Finite Line of Charge Example 26.3 in the text uses integration to find the electric field strength at a radial distance r in the plane
More information9/10/2018. An Infinite Line of Charge. The electric field of a thin, uniformly charged rod may be written:
The Electric Field of a Finite Line of Charge The Electric Field of a Finite Line of Charge Example 26.3 in the text uses integration to find the electric field strength at a radial distance r in the plane
More informationPhysics 1202: Lecture 3 Today s Agenda
Physics 1202: Lecture 3 Today s Agenda Announcements: Lectures posted on: www.phys.uconn.edu/~rcote/ HW assignments, solutions etc. Homework #1: On Masterphysics: due this coming Friday Go to the syllabus
More informationChapter 1 The Electric Force
Chapter 1 The Electric Force 1. Properties of the Electric Charges 1- There are two kinds of the electric charges in the nature, which are positive and negative charges. - The charges of opposite sign
More informationChapter 23. Electric Fields
Chapter 23 Electric Fields Electric Charges There are two kinds of electric charges Called positive and negative Negative charges are the type possessed by electrons Positive charges are the type possessed
More informationElectrostatics Notes 1 Charges and Coulomb s Law
Electrostatics Notes 1 Charges and Coulomb s Law Matter is made of particles which are or charged. The unit of charge is the ( ) Charges are, meaning that they cannot be It is thought that the total charge
More informationElectrostatics so far
Electrostatics so far F = 1 2 1 2 2 Electric Force b/n q and q : qq 1 2 kq Electric Field E due to q : E = 1 1 r 2 kq q r q e = 1.6 x10-19 C k = 9 x 10 9 Nm 2 /C 2 Tesla Envy http://www.youtube.com/watch?v=jl
More informationChapter 16. Electric Energy and Capacitance
Chapter 16 Electric Energy and Capacitance Electric Potential Energy The electrostatic force is a conservative force It is possible to define an electrical potential energy function with this force Work
More informationChapter 22 Electric Potential (Voltage)
Chapter 22 Electric Potential (Voltage) Question 29.5 Work and Electric Potential I Which requires the most work, to move a positive charge from P to points 1, 2, 3 or 4? All points are the same distance
More informationConcepTest: Electric Potential
ConcepTest: Electric Potential Which point has the largest potential when Q > 0? E Which two points have the same potential? (a) A and C (b) B and E (c) B and D (d) C and D (e) no pair C A Smallest radius
More informationSummary of electrostatics
Summary of electrostatics 1 In electrostatics we deal with the electric effects of charges at rest. Electric charge can be defined as is the intrinsic characteristic that is associated with fundamental
More informationPotentials and Fields
Potentials and Fields Review: Definition of Potential Potential is defined as potential energy per unit charge. Since change in potential energy is work done, this means V E x dx and E x dv dx etc. The
More information4 Chapter. Electric Potential
4 Chapter Electric Potential 4.1 Potential and Potential Energy... 4-3 4.2 Electric Potential in a Uniform Field... 4-7 4.3 Electric Potential due to Point Charges... 4-8 4.3.1 Potential Energy in a System
More informationPHYSICS - CLUTCH CALC-BASED PHYSICS 1E CH 23: ELECTRIC POTENTIAL.
!! www.clutchprep.com CONCEPT: ELECTRIC POTENTIAL ENERGY If you release 2 charges, they move gain. Where did it come from? - Two charges have a stored energy between them, called - ENERGY CONSERVATION:
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 2 Electrostatics Electric flux and Gauss s law Electrical energy potential difference and electric potential potential energy of charged conductors http://www.physics.wayne.edu/~alan/
More informationElectrostatics Notes 2 Electric Field on a Single Charge
Electrostatics Notes 2 Electric Field on a Single Charge There are many similarities between gravitational and electrostatic forces. One such similarity is that both forces can be exerted on objects that
More informationElectrical Potential Energy and Electric Potential (Chapter 29)
Electrical Potential Energy and Electric Potential (Chapter 29) A Refresher Course on Gravity and Mechanical Energy Total mechanical energy: E mech = K + U, K= 1 2 mv2,u = potential energy f W = F!" ids
More informationGeneral Physics (PHY 2140)
General Physics (PHY 2140) Lecture 4 Electrostatics Electric flux and Gauss s law Electrical energy potential difference and electric potential potential energy of charged conductors http://www.physics.wayne.edu/~apetrov/phy2140/
More informationNAME Write you name also on the back page of this exam.
7/25/211 Physics 212 Exam-2 NAME Write you name also on the back page of this exam. Use o = 9 x 1 9 N.m 2 /C 2, g = 1 m/s 2 1. The figure shows the cross section of a family of parallel equipotential surfaces
More informationLecture 2 Electric Fields Chp. 22 Ed. 7
Lecture Electric Fields Chp. Ed. 7 Cartoon - Analogous to gravitational field Warm-up problems, Physlet Topics Electric field Force per unit Charge Electric Field Lines Electric field from more than 1
More informationElectrostatics. 3) positive object: lack of electrons negative object: excess of electrons. Particle Mass Electric Charge. m e = 9.
Electrostatics 1) electric charge: 2 types of electric charge: positive and negative 2) charging by friction: transfer of electrons from one object to another 3) positive object: lack of electrons negative
More informationChapter 23 Electric Potential
Chapter 23 Electric Potential 23-1 Electrostatic Potential Energy and Potential Difference The electrostatic force, here,f=qe is conservative potential energy can be defined. Change in electric potential
More informationELECTROSTATIC FIELDS
ELECTROSTATIC FIELDS Electric charge Ordinary matter is made up of atoms which have positively charged nuclei and negatively charged electrons surrounding them. A body can become charged if it loses or
More informationLecture 4 Electric Potential and/ Potential Energy Ch. 25
Lecture 4 Electric Potential and/ Potential Energy Ch. 5 Review from Lecture 3 Cartoon - There is an electric energy associated with the position of a charge. Opening Demo - Warm-up problems Physlet Topics
More informationThe electric potential energy of charge q in a uniform electric field is
The electric potential energy of charge q in a uniform electric field is where s is measured from the negative plate and U 0 is the potential energy at the negative plate (s = 0). It will often be convenient
More informationLESSON 2 PHYSICS NOTES
LESSON 2 ELECTROSTATIC POTENTIAL AND CAPACITANCE SECTION I ELECTROSTATIC POTENTIAL ELECTRIC FIELD IS CONSERVATIVE In an electric field work done by the electric field in moving a unit positive charge from
More informationChapter 20. Electric Potential Electric Potential Energy
Chapter 20 Electric Potential Electric Potential Energy CONSERVTIVE FORCES conservative force gives back work that has been done against it Gravitational and electrostatic forces are conservative Friction
More information(a) This cannot be determined since the dimensions of the square are unknown. (b) 10 7 N/C (c) 10 6 N/C (d) 10 5 N/C (e) 10 4 N/C
1. 4 point charges (1 C, 3 C, 4 C and 5 C) are fixed at the vertices of a square. When a charge of 10 C is placed at the center of the square, it experiences a force of 10 7 N. What is the magnitude of
More informationLecture 2 Electric Fields Ch. 22 Ed. 7
1 2 Lecture 2 Electric Fields Ch. 22 Ed. 7 Cartoon - Analogous to gravitational field Topics Electric field = Force per unit Charge Electric Field Lines Electric field from more than 1 charge Electric
More informationChapter 25. Electric Potential
Chapter 25 Electric Potential Outline 25.1 Potential difference and electric Potential 25.2 Potential Difference and electric field 25.3 Electric Potential and Potential energy due to point charges 25.1
More informationPHYS102 EXAM #1 February 17, MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
PHYS02 EXAM # February 7, 2005 Last Name First Name MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. ) A spherical metallic shell carries a charge
More informationPHYSICS 1/23/2019. Chapter 25 Lecture. Chapter 25 The Electric Potential. Chapter 25 Preview
PHYSICS FOR SCIENTISTS AND ENGINEERS A STRATEGIC APPROACH 4/E Chapter 25 Lecture RANDALL D. KNIGHT Chapter 25 The Electric Potential IN THIS CHAPTER, you will learn to use the electric potential and electric
More informationPH 222-3A Spring 2007
PH -3A Spring 7 ELECTRIC FIELDS Lectures,3 Chapter (Halliday/Resnick/Walker, Fundamentals of Physics 8 th edition) 1 Chapter Electric Fields In this chapter we will introduce the concept of an electric
More informationElectric Potential. 1/28/14 Physics for Scientists & Engineers 2, Chapter 23 1
Electric Potential 1/28/14 Physics for Scientists & Engineers 2, Chapter 23 1 Notes! Correction set 1 Due Thursday evening at 10pm Name: Correction #1 RS Must answer all questions correctly to receive
More informationChapter 24. QUIZ 6 January 26, Example: Three Point Charges. Example: Electrostatic Potential Energy 1/30/12 1
QUIZ 6 January 26, 2012 An electron moves a distance of 1.5 m through a region where the electric field E is constant and parallel to the displacement. The electron s potential energy increases by 3.2
More informationPHYS 2426 Brooks INTRODUCTION. Physics for Scientists and Engineers, with Modern Physics, 4 th edition Giancoli
PHYS 2426 Brooks INTRODUCTION http://iws.ccccd.edu/mbrooks Physics for Scientists and Engineers, with Modern Physics, 4 th edition Giancoli Chapter 21 Electric Charge and Electric Field Static Electricity;
More informationChapter Electric Forces and Electric Fields. Prof. Armen Kocharian
Chapter 25-26 Electric Forces and Electric Fields Prof. Armen Kocharian First Observations Greeks Observed electric and magnetic phenomena as early as 700 BC Found that amber, when rubbed, became electrified
More informationAP Physics Study Guide Chapter 17 Electric Potential and Energy Name. Circle the vector quantities below and underline the scalar quantities below
AP Physics Study Guide Chapter 17 Electric Potential and Energy Name Circle the vector quantities below and underline the scalar quantities below electric potential electric field electric potential energy
More information= m = kg = kg
Physics Unit 8 1 2 3 N = q e N = 4 10 6 C 1.6 10 19 = 2.5 1013 C m = 2.5 10 13 9.11 10 31 kg = 2.28 10 17 kg 4 When you rub a balloon on your hair, the balloon steals electrons from the hair. The balloon
More informationCPS lesson Electric Field ANSWER KEY
CPS lesson Electric Field ANSWER KEY 1. A positively charged rod is brought near a conducting sphere on an insulated base. The opposite side of the sphere is briefly grounded. If the rod is now withdrawn,
More informationConductors: External Electric Field 1/28/2018 1
Conductors: External Electric Field 1/28/2018 1 Two Parallel Conducting Sheets Find the electric field to the left of the sheets, between the sheets and to the right of the sheets. 1/28/2018 2 Uniform
More informationis at the origin, and charge q μc be located if the net force on q
Term: 152 Saturday, April 09, 2016 Page: 1 Q1. Three point charges are arranged along the x-axis. Charge q 3.0 0 μc 1 is at the origin, and charge q 5.0 0 μc 2 is at x = 0.200 m. Where should a third charge
More informationChapter 10. Electrostatics
Chapter 10 Electrostatics 3 4 AP Physics Multiple Choice Practice Electrostatics 1. The electron volt is a measure of (A) charge (B) energy (C) impulse (D) momentum (E) velocity. A solid conducting sphere
More informationReview. Spring Semester /21/14. Physics for Scientists & Engineers 2 1
Review Spring Semester 2014 Physics for Scientists & Engineers 2 1 Notes! Homework set 13 extended to Tuesday, 4/22! Remember to fill out SIRS form: https://sirsonline.msu.edu Physics for Scientists &
More informationLecture 2 [Chapter 21] Tuesday, Jan 17th
Lecture 2 [Chapter 21] Tuesday, Jan 17th Administrative Items Assignments this week: read Ch 21 and Ch 22 in the textbook complete Pre-Lecture Ch22 HW assignment complete Ch 21 HW assignment [Pre-Lecture
More informationElectric Potential. Chapter 23. PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman
Chapter 23 Electric Potential PowerPoint Lectures for University Physics, Twelfth Edition Hugh D. Young and Roger A. Freedman Lectures by Reza Khanbabaie Goals for Chapter 23 Reminder about gravitational
More informationElectric Potential Energy & Electric Potential
Electric Potential Energy & Electric Potential Consider the following scenario. F E F E pt.a If we release the ve charge from pt.a The ELECTRIC FIELD produced by the ve charge pulls the ve charge to the
More informationChapter 23 Electric Potential (Voltage)
Chapter 23 Electric Potential (Voltage) Electric potential energy Recall how a conservative force is related to the potential energy associated with that force: The electric potential energy: Change in
More informationLecture 15. PHYC 161 Fall 2016
Lecture 15 PHYC 161 Fall 2016 Q23.11 A solid spherical conductor has a spherical cavity in its interior. The cavity is not centered on the center of the conductor. If there is a net positive charge on
More information1. ELECTRIC CHARGES AND FIELDS
1. ELECTRIC CHARGES AND FIELDS 1. What are point charges? One mark questions with answers A: Charges whose sizes are very small compared to the distance between them are called point charges 2. The net
More information1. Four equal and positive charges +q are arranged as shown on figure 1.
AP Physics C Coulomb s Law Free Response Problems 1. Four equal and positive charges +q are arranged as shown on figure 1. a. Calculate the net electric field at the center of square. b. Calculate the
More information9/4/2018. Electric Field Models. Electric Field of a Point Charge. The Electric Field of Multiple Point Charges
Electric Field Models One thing learned from last chapter was that sources determine the electric field. We can understand the essential physics on the basis of simplified models of the sources of electric
More informationElectric Field Models
Electric Field Models One thing learned from last chapter was that sources determine the electric field. We can understand the essential physics on the basis of simplified models of the sources of electric
More informationSolution. ANSWERS - AP Physics Multiple Choice Practice Electrostatics. Answer
NSWRS - P Physics Multiple hoice Practice lectrostatics Solution nswer 1. y definition. Since charge is free to move around on/in a conductor, excess charges will repel each other to the outer surface
More informationAP Physics C. Electric Potential and Capacitance. Free Response Problems
AP Physics C Electric Potential and Capacitance Free Response Problems 1. Two stationary point charges + are located on the y-axis at a distance L from the origin, as shown above. A third charge +q is
More informationPHYSICS. Electrostatics
Electrostatics Coulomb s Law: SYNOPSIS SI unit of electric intensity is NC -1 Dimensions The electric intensity due to isolated point charge, Electric dipole moment, P = q (2a), SI unit is C m Torque on
More informationClass XII Chapter 1 Electric Charges And Fields Physics
Class XII Chapter 1 Electric Charges And Fields Physics Question 1.1: What is the force between two small charged spheres having charges of 2 10 7 C and 3 10 7 C placed 30 cm apart in air? Answer: Repulsive
More informationF 13. The two forces are shown if Q 2 and Q 3 are connected, their charges are equal. F 12 = F 13 only choice A is possible. Ans: Q2.
Q1. Three fixed point charges are arranged as shown in Figure 1, where initially Q 1 = 10 µc, Q = 15 µc, and Q 3 = 5 µc. If charges Q and Q 3 are connected by a very thin conducting wire and then disconnected,
More informationCh 25 Electric Potential! Electric Energy, Electric Potential!
Ch 25 Electric Potential Electric Energy, Electric Potential Energy concepts are going to be extremely important to us as we consider the behavior of charges in electric fields. How do energy concepts
More informationPHYS ST semester Dr. Nadyah Alanazi. Lecture 11
1 PHYS 104 1 ST semester 1439-1440 Dr. Nadyah Alanazi Lecture 11 25.1 Potential Difference and Electric Potential When a test charge q 0 is placed in an electric field E created by some source charge,
More informationChapter 23. Electric Fields
Chapter 23 Electric Fields Electricity and Magnetism The laws of electricity and magnetism play a central role in the operation of many modern devices. The interatomic and intermolecular forces responsible
More informationr 4 r 2 q 2 r 3 V () r En dln (r) 1 q 1 Negative sign from integration of E field cancels the negative sign from the original equation.
Question from last class Potential due to a Group of Point Charges rr V () r E dl r r 1 q 1 X rr N V () r E dl r n n N V(r) V n (r) 1 n1 4 o 1/30/2018 2 q 2 N r r N r r q n V () r En dln dr 2 n n r n r
More informationElectric Potential Energy & Electric Potential
Electric Potential Energy & Electric Potential Consider the following scenario. F E F E pt.a If we release the ve charge from pt.a The ELECTRIC FIELD produced by the ve charge pulls the ve charge to the
More informationMTE1 results. Mean 75% = 90/120
MTE1 results Mean 75% = 90/120 Scores available at Learn@UW, your TAs have exams If your score is an F or a D, talk to us and your TAs for suggestions on how to improve From last times Electric charges
More information